ZHCSKO3B January   2020  – September 2020 BQ25611D

PRODUCTION DATA  

  1. 特性
  2. 应用
  3. 说明
  4. Revision History
  5. 说明(续)
  6. Device Comparison Table
  7. Pin Configuration and Functions
    1.     Pin Functions
  8. Specifications
    1. 8.1 Absolute Maximum Ratings
    2. 8.2 ESD Ratings
    3. 8.3 Recommended Operating Conditions
    4. 8.4 Thermal Information
    5. 8.5 Electrical Characteristics
    6. 8.6 Timing Requirements
    7. 8.7 Typical Characteristics
  9. Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1  Power-On-Reset (POR)
      2. 9.3.2  Device Power Up from Battery without Input Source
      3. 9.3.3  Power Up from Input Source
        1. 9.3.3.1 Power Up REGN LDO
        2. 9.3.3.2 Poor Source Qualification
        3. 9.3.3.3 Input Source Type Detection (IINDPM Threshold)
          1. 9.3.3.3.1 D+/D– Detection Sets Input Current Limit
        4. 9.3.3.4 Input Voltage Limit Threshold Setting (VINDPM Threshold)
        5. 9.3.3.5 Power Up Converter in Buck Mode
        6. 9.3.3.6 HIZ Mode with Adapter Present
      4. 9.3.4  Boost Mode Operation From Battery
      5. 9.3.5  Power Path Management
        1. 9.3.5.1 Narrow VDC Architecture
        2. 9.3.5.2 Dynamic Power Management
        3. 9.3.5.3 Supplement Mode
      6. 9.3.6  Battery Charging Management
        1. 9.3.6.1 Autonomous Charging Cycle
        2. 9.3.6.2 Battery Charging Profile
        3. 9.3.6.3 Charging Termination
        4. 9.3.6.4 Thermistor Qualification
          1. 9.3.6.4.1 JEITA Guideline Compliance During Charging Mode
          2. 9.3.6.4.2 Boost Mode Thermistor Monitor During Battery Discharge Mode
        5. 9.3.6.5 Charging Safety Timer
      7. 9.3.7  Ship Mode and QON Pin
        1. 9.3.7.1 BATFET Disable (Enter Ship Mode)
        2. 9.3.7.2 BATFET Enable (Exit Ship Mode)
        3. 9.3.7.3 BATFET Full System Reset
      8. 9.3.8  Status Outputs ( STAT, INT )
        1. 9.3.8.1 Charging Status Indicator (STAT)
        2. 9.3.8.2 Interrupt to Host ( INT)
      9. 9.3.9  Protections
        1. 9.3.9.1 Voltage and Current Monitoring in Buck Mode
          1. 9.3.9.1.1 Input Over-Voltage Protection (ACOV)
          2. 9.3.9.1.2 System Over-Voltage Protection (SYSOVP)
        2. 9.3.9.2 Voltage and Current Monitoring in Boost Mode
          1. 9.3.9.2.1 Boost Mode Over-Voltage Protection
        3. 9.3.9.3 Thermal Regulation and Thermal Shutdown
          1. 9.3.9.3.1 Thermal Protection in Buck Mode
          2. 9.3.9.3.2 Thermal Protection in Boost Mode
        4. 9.3.9.4 Battery Protection
          1. 9.3.9.4.1 Battery Over-Voltage Protection (BATOVP)
          2. 9.3.9.4.2 Battery Over-Discharge Protection
          3. 9.3.9.4.3 System Over-Current Protection
      10. 9.3.10 Serial Interface
        1. 9.3.10.1 Data Validity
        2. 9.3.10.2 START and STOP Conditions
        3. 9.3.10.3 Byte Format
        4. 9.3.10.4 Acknowledge (ACK) and Not Acknowledge (NACK)
        5. 9.3.10.5 Slave Address and Data Direction Bit
        6. 9.3.10.6 Single Read and Write
        7. 9.3.10.7 Multi-Read and Multi-Write
    4. 9.4 Device Functional Modes
      1. 9.4.1 Host Mode and Default Mode
    5. 9.5 Register Maps
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
        1. 10.2.2.1 Inductor Selection
        2. 10.2.2.2 Input Capacitor and Resistor
        3. 10.2.2.3 Output Capacitor
    3. 10.3 Application Curves
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Device Support
    2. 13.2 Documentation Support
      1. 13.2.1 Related Documentation
    3. 13.3 Receiving Notification of Documentation Updates
    4. 13.4 Support Resources
    5. 13.5 Trademarks
    6. 13.6 Electrostatic Discharge Caution
    7. 13.7 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

说明(续)

该解决方案在系统和电池之间高度集成输入反向阻断 FET(RBFET,Q1)、高侧开关 FET(HSFET,Q2)、低侧开关 FET(LSFET,Q3)以及电池 FET(BATFET、Q4)。它还集成了自举二极管以进行高侧栅极驱动,从而简化系统设计。I2C 串行接口和充电和系统设置使该器件成为一款真正灵活的解决方案。

该器件支持多种输入源,包括标准 USB 主机端口、USB 充电端口、兼容 USB 的高电压适配器和无线电源。该器件符合 USB 2.0 和 USB 3.0 电源规格,具有输入电流和电压调节功能。该器件从系统检测电路(如 USB PHY 器件)获取结果。

该器件通过单个电感器将降压充电器和升压稳压器集成在一个解决方案中。通过提供 5V 电压(可调 4.6V/4.75V/5V/5.15V),恒定电流限值高达 1.2A,该器件可符合 USB On-the-Go (OTG) 运行功率额定值规格。

在应用适配器时,电源路径管理将系统电压调节至稍高于电池电压的水平,但不会降至 3.5V 最小系统电压(可编程)以下。借助于这个特性,即使在电池电量完全耗尽或者电池被拆除时,系统也能保持运行。当达到输入电流限值或电压限值时,电源路径管理会自动减小充电电流。随着系统负载持续增加,电池开始放电,直到满足系统电源需求。该补充模式可防止输入源过载。

此器件在无需软件控制情况下启动并完成一个充电周期。它感应电池电压并通过三个阶段为电池充电:预充电、恒定电流和恒定电压。在充电周期的末尾,当充电电流低于预设限值并且电池电压高于再充电阈值时,充电器自动终止。如果已完全充电的电池降至再充电阈值以下,则充电器自动启动另一个充电周期。

此充电器提供针对电池充电和系统运行的多种安全特性,其中包括电池负温度系数热敏电阻监视、充电安全性计时器和过压/过流保护。当结温超过 110°C 时,热调节会减小充电电流。状态寄存器报告充电状态和任何故障状况。借助 I2C,VBUS_GD 位指示电源是否正常, 当故障发生时, INT 输出会立即通知主机。

该器件还提供用于 BATFET 使能和复位控制的QON 引脚,以退出低功耗出厂模式或完全系统复位功能。

BQ25611D 器件采用 24 引脚 4mm × 4mm x 0.75mm 薄型 WQFN 封装。